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SCG Means scheduled caste General when candidates belongs to SC Category but under general and not under any reservations like Kannada Medium or rural such can opt SCG.
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For more information regarding STAGE – 1: CASUAL VACANCY ROUND FOR MEDICAL AND DENTAL COURSES
refer to http://kea.kar.nic.in/KEA%20Brochure_Inside%20Pages%2020_37%20Color.pdf

SC G is Scheduled Caste General. And then there is also SC K which stands for Scheduled Category Karnataka. SC G is for those Candidates who belong to SC Category but do not have sub reservations like Rural or Karnataka medium. They just have Scheduled Caste Reservation which is 15%.

SC G is Scheduled Caste General. And then there is also SC K which stands for Scheduled Category Karntaka. SC G is for those Candidates who belong to SC Category but do not have sub reservations like Rural or Karnataka medium. They just have Scheduled Caste Reservation which is 15%.